9 physician specialties, ranked by female representation

Less than a third (30.2 percent) of internal medicine residents were women in 1991. Twenty-five years later, still less than half (43.2 percent) of internal medicine residents were women, according to a research letter published by JAMA Internal Medicine.

The research letter studied the sex of physicians in internal medicine residency and subspecialty fellowships from 1991-2016 using enrollment data from the Accreditation Council for Graduate Medical Education.

In 1991, of the 7,986 residents in subspecialty fellowships, 33.3 percent were women. That percentage decreased to 23.6 percent in 2016.

Here is how nine subspecialties stacked up in terms of female representation in 2016: